Hey everyone! A couple friends from school and myself are working on a semi-automated home brewery for a spring project at college. We need a modulating gas valve to electronically control the flow of propane from our tank to the burner for the HLT. We plan on using a controller implemented with software to control this valve. Has anyone had any experiences with these valves? Is there a certain brand you have used that works better than others? I have done some searching for a modulating gas valve, but don't know which to go with. If anyone has any input, please let me know. Also, the ones I have looked at are rather expensive for our budget, so if anyone has a used one they would sell for a cheaper price...I would be very interested. Thanks!